Why Biosurfactant production varies with the carbon sources?

Some Pseudomonas sp. are reported for biosurfactant production with glucose as a carbon source, where as other Pseudomonas sp. reports the significant BS production with hydrocarbon. Why?

12 November 2019 282 3 View

What will be the cause?

For the identification of Biosurfactant producing bacteria, I am trying to sequencing the 16s rDNA, that i had done three time. Unfortunately, i did not get any results. After amplification, i...

01 May 2016 7,823 3 View

Is there a way to get rid of TEA in a TLC plate in order to do proper staining?

Dear colleagues: I have been trying to establish a few HP-TLC methods in the lab. In general, for quantification purposes, I prefer CuSO4+acid charring, to primuline staining. Lately I have been...

20 January 2021 9,019 1 View

What effect will different solvents have on the ATRP reaction?

I want to do an ATRP reaction, synthesize an ATRP initiator, use DMF as a solvent, and mix DMF, BIBB and TEA to turn red. Why does it turn red? Xylene has been used as a solvent before, and there...

04 January 2021 8,034 3 View

Dear professors, i am confused with how to figure out the tea bag index?

Hello, i am confused with how to figure out the tea bag index,could you please tell me how to compute the letter "a" and "k". Can i use R or Sigmaplot to fix it?

09 December 2020 6,705 3 View

Can you please complete an onlinse survey? (only if you are 18 or over and you consume herbal tea or tisans)?

Hello, I am a research student in MSc Food Science and Innovation at Manchester Metropolitan University for 2019-2020. I would hereby like to invite you to take part in my dissertation research...

30 November 2020 528 2 View

What does this ghost peak come from?

We analyse oligonucletide using Ion-pair reversed phase chromatography. The mobile phase A is composed of triethylamine (TEA), hexafluoroisopropanol (HFIP), water. And the mobile phase B is the...

27 September 2020 4,210 3 View

How can I remove triethylamine tfa salt from my peptide?

I'm now purifying a modified tripeptide which is quiet non-polar and sensitive to acidic condition. Thus I added triethylamine (TEA) to neutralize the HPLC fraction which contains 0.1% TFA and...

07 August 2020 5,396 3 View

How to measure tea powder sample into ppm unit (not the extract, just the sample)?

If I soak 1 g tea powder into 100 mL aquades for 12 / 24 hour, can we assume that it is a 10000 ppm sample, not the extract, just the tea powder liquid (sample)? and if Yes, could you give me...

13 July 2020 1,693 7 View

Is taking coffee and tea without milk beneficial for our health?

Consumption of tea and coffee without milk is considered beneficial for our health. Can you please explain the reasons behind it? what can be other methods for improving sensory characteristics...

14 May 2020 6,096 23 View

Is comparing some rates among the patients with respective rates in general population appropriate in epidemiology?

Is it appropriate to compare rates of (for instance) tea consumers among patients admitted to a hospital with some disease, with rates of tea consumers in general population in the same country?...

11 March 2020 5,560 3 View

Total of polyphenols in tea extracts conc mg/l to mg/g dry tea?

04 March 2020 3,649 7 View